Home / 1,247.84-1,862.68-1,145.12

Finding the Fourth Proportional to 1,247.84, 1,862.68 and 1,145.12

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Solution

The fourth proportional to 1,247.84, 1,862.68 and 1,145.12 is: 1,709.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.84 : 1,862.68 = 1,145.12 : x
  2. Step 2: Convert to fraction form
    1,247.84/1,862.68 = 1,145.12/x
  3. Step 3: Cross multiply
    1,247.84x = 1,862.68 × 1,145.12
  4. Step 4: Simplify right side
    1,247.84x = 2,132,992.12
  5. Step 5: Solve for x
    x = 2,132,992.12/1,247.84
  6. Step 6: Final answer
    x = 1,709.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.